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SIP Trunking

SIP Trunking gives you the best of both worlds: the improved functionality and cost-efficiency of VoIP phone plans and the ability to keep your current phone system.

Providers like Vocalocity and Nextiva can customize their plans to provide top-notch SIP service. Check out these providers and others below, on our SIP Trunking comparison table. And below the table, we have elaborated on some of the most interesting features of SIP trunking.

SIP Trunking Provider Info
Provider Solutions Costsort icon User Rating

PBX SIP Trunking

No contracts, unlimited calling, best-quality calls. A complete business solution.
  • Compatible with almost all PBX systems
  • US-based support
  • No contracts
 $14.95
4.6

Jive PBX

$21.95 per month for unlimited calling to 48 states and access to all of Jive's PBX features....
  • Unlimited Virtual Extensions
  • Free Long Distance
  • No Contracts or Hidden Fees
 $21.95
4.786665

Unlimited Business Calling SIP Solution

Convert your current phone system to VoIP.
  • Best Overall Quality and Service
  • Unlimited Calling in/out
  • Month to Month Agreement only
 $24.95
4.92857

RingCentral Office

RingCentral Office: unlimited calling and faxing, from 24.99/user and up.
  • Unlimited Calling and Faxing (US & Canada)
  • No Commitment, No Setup Fees, No Installation
  • Price for 20+ users
 $26.99
4.4

Rates shown do not include taxes, e911 charges, and other taxes and surcharges. Some restrictions apply - please click "Details" to review each offer carefully.

Technically speaking, SIP stands for "Session Initiation Protocol." SIP Trunking refers to blending data and voice connections into a single line. Instead of using both a phone network and a data network, you can use the Internet to transfer your voice and your data. SIP trunking uses your onsite PBX (that’s the telephone switching system that you already have) to route the calls. But the difference in price comes from the consolidation of your connections and the increased efficiency that brings.






Like this infographic? Check out some others on our infographics page!

Some of the benefits of SIP:

  • Increased reliability, backed by the SIP Trunk Providers
  • Caller ID
  • DID calling for every extension
  • Local and long distance calling
  • E911